Update to docs to support docs type and version separately.

Added support for API versions (3, 4.*)
This was brought up in issue #24

Limiting the response for No result, to avoid a possibly large query response
Merge pull request #27 from lagbox/docs/api

Update to docs to support docs type and version separately.
Adjust trigger !dunno escaping

Because 2 slashes are better than 1.
Merge pull request #29 from lagbox/fix/dunno-trigger

Adjust trigger !dunno escaping
Add flag to return top result instead of random result for image/animate/youtube.

This keeps the default functionality as random result.
Tighten regex for !docs trigger.

Current regex catches !docscontrib. New regex requires a space after !docs.
Merge pull request #31 from lagbox/fix/docs-regex

Tighten regex for !docs trigger.
Merge pull request #30 from lagbox/feature/more-than-just-random

Add flag to return top result for image/animate/youtube